<div>
  <a nz-button nz-dropdown nzType="link" [nzDropdownMenu]="dropdownMenu">
    Hover me
    <span nz-icon nzType="down"></span>
    <nz-dropdown-menu #dropdownMenu>
      <div nz-menu nzSelectable>
        <div nz-menu-item>1st menu item</div>
        <div nz-menu-item>2nd menu item</div>
        <div nz-menu-item>3rd menu item</div>
        <div nz-menu-item nzDanger>4th menu item</div>
      </div>
    </nz-dropdown-menu>
  </a>
</div>
